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/**
* Implements a singleton that maintains keyboard state. The single instance
* is (re)instantiated on demand like:
* KeyController *kbd = KeyController::Instance();
*
* 25-04-07,Nigel Brown(EMBL): created.
*/
#ifndef KEYCONTROLLER_H
#define KEYCONTROLLER_H
#include <QObject>
#include <QKeyEvent>
#include <QEvent>
class KeyController : public QObject {
public:
/* return the KeyController singleton */
static KeyController *Instance();
/* resetters */
void clear() { keyShift = keyCtrl = false; };
void clearShift() { keyShift = false; };
void clearCtrl() { keyCtrl = false; };
/* setters */
bool consumeKeyPress(int key);
bool consumeKeyRelease(int key);
/* testers */
bool shiftPressed() { return keyShift; }
bool shiftReleased() { return !keyShift; }
bool ctrlPressed() { return keyCtrl; }
bool ctrlReleased() { return !keyCtrl; }
protected:
/* hide the constructors */
KeyController();
KeyController(const KeyController&);
KeyController& operator= (const KeyController&);
//- bool eventFilter(QObject *o, QEvent *e);
private:
/* keyboard state */
bool keyShift;
bool keyCtrl;
};
#endif //KEYCONTROLLER_H
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